| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- | ||
| 2 | // vi: set et ts=4 sw=4 sts=4: | ||
| 3 | // | ||
| 4 | // SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder | ||
| 5 | // SPDX-License-Identifier: GPL-3.0-or-later | ||
| 6 | // | ||
| 7 | /*! | ||
| 8 | * \file | ||
| 9 | * \ingroup Typetraits | ||
| 10 | * \brief Type traits. | ||
| 11 | */ | ||
| 12 | #ifndef DUMUX_TYPE_TRAITS_HH | ||
| 13 | #define DUMUX_TYPE_TRAITS_HH | ||
| 14 | |||
| 15 | #include <type_traits> | ||
| 16 | |||
| 17 | namespace Dumux { | ||
| 18 | |||
| 19 | /*! | ||
| 20 | * \brief Template which always yields a false value | ||
| 21 | * \tparam T Some type. | ||
| 22 | */ | ||
| 23 | template<typename T> | ||
| 24 | struct AlwaysFalse : public std::false_type {}; | ||
| 25 | |||
| 26 | /*! | ||
| 27 | * \brief Function that performs no operation. | ||
| 28 | */ | ||
| 29 | ✗ | inline constexpr auto noop = [] (auto...) {}; | |
| 30 | using Noop = decltype(noop); | ||
| 31 | |||
| 32 | /*! | ||
| 33 | * \brief Helper template to select type T if it is not void | ||
| 34 | * or fall back to the given default type otherwise. | ||
| 35 | */ | ||
| 36 | template<typename Default, typename T> | ||
| 37 | using NonVoidOr = std::conditional_t<!std::is_void_v<T>, T, Default>; | ||
| 38 | |||
| 39 | } // end namespace Dumux | ||
| 40 | |||
| 41 | #endif | ||
| 42 |